ruby -cw - checks syntax and gives warnings without executingirb --simple-prompt --noecho - simpler prompt without echos (aka self-explanatory)load filename.rb - this will allow me to update while testing in irbrake - Ruby make task-management utilityri String#upcase - quickly look at rdocs for given method / classgem install ___ - really easy to add third party gemsChapter 2
def m(a, b=2, *c, d) - example of argument lists